package com.itheima.reggie.service.impl;/**
 * 功能描述
 *
 * @author 唯硕
 * @date 2022/09/20  16:50
 */

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

/**
 *@ClassName CategoryServiceImpl
 *@Description TODO 菜品类别
 *@Author 唯硕
 *@Date 2022/9/20 16:50
 *@Version 1.0
 */
@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {
    @Autowired
    private DishService dishService;

    @Autowired
    private SetmealService setmealService;
    @Override
    public void remove(Long id) {
        //查询当前分类是否关联了菜品，如果已经关联，抛出一个异常
        LambdaQueryWrapper<Dish> dishlambdaQueryWrapper = new LambdaQueryWrapper<>();
        dishlambdaQueryWrapper.eq(Dish::getCategoryId,id);
        int count1 = dishService.count(dishlambdaQueryWrapper);
        if(count1>0){
            throw new CustomException("当前分类下关联了菜品，不能删除");
        }
        //查询当前分类是否关联了套餐，如果已经关联，抛出一个异常
        LambdaQueryWrapper<Setmeal> setmealLambdaQueryWrapper = new LambdaQueryWrapper<>();
       setmealLambdaQueryWrapper.eq(Setmeal::getCategoryId, id);
        int count2 = setmealService.count(setmealLambdaQueryWrapper);
        if(count2>0){
            throw new CustomException("当前分类下关联了套餐，不能删除");
        }

        //正常删除分类
        super.removeById(id);

    }
}
